True Jake, but what is the design windspeed of the N20? Anyone care to venture a guess?
But to second your opinion, the sea state and course outline have to be factored in. If it's a sheltered course with little if any sea/swell, then you could very well race at or slightly above design windspeed.
If your race venue is unprotected, your participants are underexperienced, and the safety fleet would have difficulties, then the PRO should consider pulling the plug even if the windspeed weren't over design limits.
I'm sure we've all been to one or more buoy races where the safety boats had a hard time keeping up with the flips and other carnage on the course...